Motor cylinder,



c, A KIRKHAM. MOTOR CYLINDER.

APPucATmN man oer. 22. I915.

1,3 1 0,9 1 3. Patented July 22, 1919.

2 SHEETS-S HE ET I.

PIC-5.1.

Infientor 13 CLARENCE AMIRKHAM lfybbomeg rm: cuummu I LANunuM-I' m. WASHINGTON. n. c.

C. A. KIRKHAM.

MOTOR CYLINDER. APPucmoN FILED on. 22. 1915.

Patented July 22, 1919.

2 SHEETS-SHEET 2 Inventor CLAEENCE'A.KIRKHAM. IJWM attorney rue COLUMHIA PLANIHJkM'I'l cm, wasmuumu, n. c

UNITED STATES PATENT OFFICE.

CLARENCE A. KIRKHAM, 0F HAMMONDSPORT, NEW YORK, ASSIGNOR, BY MESNE ASSIGNMENTS, TO CURTISS AEROILANE AND MOTOR CORPORATION, OF BUFFALO, NEW YORK, A CORPORATION OF NEW YORK.

MOTOR-CYLINDER.

Specification of Letters Patent.

Patented July 22, 1919.

To all whom it may concern:

Be it known that I, CLARENCE A. KIRK- HAM, a citizen of the United States, residing at Hammondsport, in the county of Steuben and State of New York, have invented certain new and useful Improvements in Motor- Cylinders, of which the following is a specification.

This invention relates to cylinders for internal combustion engines and is chiefly concerned with the provision of an engine cylinder capable of use with the highspeed com bustion engines usually employed for air craft, the cylinder being of such design as to facilitate the development of a maximum of power and speed with a minimum weight.

Highspeed engines of this type require a large combustion chamber, large valve passage ways leading thereinto and an extensive cooling system. The cylinder the present inventionmeets all t iese requirements and at the same time effects a savingin the weight with no sacrifice of strength. The cylinder head is enlarged to overhang the cylinder body, thus affording an enlarged combustion space and at the same time permitting the use of valve passage ways of dimensions much larger than the ordinary. The use of such passage ways greatly facilitates the introduction of a combustible mixture into the cylinder and the scavenging of combustion products therefrom. Novel means are also provided in this invention for the provision of a waterjacket to completely surround the cylinder body, the combustion chamber and the valve passage way, while at the same time permitting the use of a single strip of thin material for the formation of this jacket.

It is the object of this invention to disclose the construction of engine cylinders which will be capable of attaining the disroduced by,

cussed advantages and in the manner therein set forth.

The above and additional objects, which will be hereinafter s ecifically treated, are accomplished by suc means as are illustrated in the accompanying drawings, described in the following specification, and then more particularly pointed out in the claims which are appended hereto and form a part of this application.

With reference to the drawings wherein there is illustrated the preferred construction of the engine cylinder provided by this invention, and throughout which like characters of reference desi nate similar parts,

Figure 1 is a view 0% the engine cylinder, partly in elevation and partly in section,

Fig. 2 is a fragmentary sectional view of the cylinder head taken at right angles to the same as illustrated in Fig. 1,

lgig. 3 is a top plan view of the cylinder, an

Fig. 4 is a similar view, but with the water-jacket of Fig. 3 removed.

The body portion of the cylinder is preferably formed of a solid block of such metallic material as may be desirable owing to its strength, toughness or other qualities of durability. This solid block of metal is centrally bored to provide the cylindrical 'shell 5, and to also form the integral cylinder head 6 which is enlarged upon the shell 5 to provide the combustion chambers 7 of the cylinder. Integral lugs 8 project upwardly from the cylinder head 6 and are threadingly bored,'in the manner denoted by the numeral 9, for the reception of spark plugs such as are usually inserted into the cylinders of internal combustion engines for the purpose of producing ignition.

A seat flange 10 is provided adjacent the lower extremlty of the cylinder and from this flange there projects an apron 11 through the medium of which the cylinder is adapted to be seated upon the crank casing, the latter not being shown. The ribs or flanges 12 are also circumferentially formed upon the cylinder body 5 and at spaced intervals in order to both strengthen the cylinder and to permit of the same being more readily cooled, owing to the 1ncreased surface provided for radiation by such flanges or ribs. The lowermost of these cooling ribs is of the increased width denoted by the numeral 13 in order that it may extend beyond the limit of the remaining flanges. A crown plate 14 is suitably supported by the lugs 8 of the cylinder head to similarly extend therebeyond, and a water jacket which is desi ated as a whole by the numeral 15 inclu es a strip of materlal the upper edge of which is secured in the preferred manner, such as by brazlng to the crown plate 14, while the lower edge is similarly connected to the projecting flange or rib 13. The ends of the strip 15 are lapped and riveted or otherwise secured, as shown at 16. The provision of the crown plate and of the widened flange 13 permit the use of a single strip of thin material to form the water jacket for the cylinder 5, so that lightness is serured at no sacrifice of strength. It should be noted that the water jacket has its upper portion enlarged in a manner, as shown by the numeral 17, to correspond with the combustion chamber enlargement, spacedly surrounding this chamber as well as the cylinder. An inlet for cooling fluid is designated by the numeral 18 and connects with the jacket 15 at one of its lowermost points, while the outlet 19 projects from the uppermost portion of the jacket in order to cause a complete circulation of the cooling fluid around the flanges 12, the combustion chamber 7 and the head 6 of the engine cylinder.

Owing to the fact that the combustion chamber of the engine cylinder is considerably enlarged to overhan such cylinder, valve passage ways 20 an 21 may be rovided for the cylinder, which are 0. an extra size. Each of these passage wa s is formed by a fianging up of the cylinder ead 6 in a manner similar to the method for formin the lugs 8. Valve seats 22 are beveled into the passage ways at the.time of flanging up the head 6 to form the same, and the material of the cover is preferably thickened at points 23 in order to permit of the same being bored, as shown at 24, for the reception of the removable securing means mounting'the intake and exhaust valves Within their respective passageways. Any operating means may be employed for the timed actuation of these valves, although the cylinder head is prepared for the reception of rocker arms of a familiar type adapted to control action of the valves against the constant tension of springs normally tending to maintain them closed. Since these rocker arms must be mounted in a fixed pivoted relation to the cylinder heads, socket portions 25 are either brazed. to or formed integrally on the under side of the crown plate 14 and are then adapted to provide threaded seats for the ivot arms upon which may be mounted t e rocker arms of respective valves. The crown plate 14: is, of course, properly cut away to accommodate the raised passageways of the cylinder head 6, as is illustrated to advantage in Fig. 2.

From the foregoing it will be apparent that the primary design of this invention has been carried out b means of the construction just describedi The cylinder is provided with an enlarged combustion chamber, and the forming of the cylinder head with the integral lugs 8 will obviously result in a saving of weight without loss of strength. The crown plate supportedby the lugs and the widened cooling flange 13 offer means for mounting the water jacket 15 which greatly simplify the construction of this important accessory of the cylinder, while at the same time permitting economization of the material. en'iployed as the jacket.

While in. the foregoing there has been illustrated. in the drawings and described in the specification such combination and arrangement of elements as constitute the preferred construction or embodiment of this invention in cylinders for internal combustion engines, it is nevertheless desird, to emphasize the fact that interpretation of the invention should only be conclusive when made in the light of the appended claims.

What I claim is:

1. An engine cylinder including a hollowed body, a head for said. cylinder formed integral. with said body, valve seats formed integrally in said head to overlap the periphery of the cylinder body, a waterjacket surrounding said body, and a crown plate supported by said integral valve seats and overhanging said combustion chamber to form the top of said jacket.

2. The combination in an engine cylinder of a hollowed body, a head for said cylinder formed integral with said body and enlarged to provide a combustion chamber overhanging the said body, lugs projecting integrally from Said head, a crown plate carried by said lugs and overhangirn said combustion chamber, and a water acket composed of a single strip of material and having its upper edge secured to the overhanging crown plate and having its ends lapped to surround both cylinder body and said combustion chamber.

3. The combination in an engine cylinder of a hollowed body, an integrally formed cylinder head, lugs integrally projectin from said head, a crown plate inte ral y united to said lugs to overhang said cylinder, cooling flanges formed upon said cylinder body, the lowermost of said flanges being of a relatively increased Width, and a waterjacket composed of a single strip of material having its ends lapped to surround the cylinder and having opposite edges secured to said overhanging crown plate and widened flange.

4:. An engine cylinder comprising a hollowed body having an enlarged end to form an expanded combustion chamber, an an larged cylinder head formed integrally with .the enlarged end of said body, a water jacket, an integrally united crown plate forming a part of said jacket, and valve walls integrally formed on the cylinder head for engagement with the crown latte, the valve walls collectively forming a su stantially continuous support for said plate throughout its diameter.

5. ,A cylinderfor an internal combustion engine comprising a main cylinder body having an enlarged end to form an expanded explosion chamber, an enlarged cylinder head formed integrally with the expanded end of the cylinder and having valve seats formed therein, a water jacket shell adapted to conform to the shape of said cylinder, a crown plate carried upon said cylinder head, and means integrally formed on said cylinder to maintain said Water jacket in spaced relation thereto.

6. An engine cylinder including a hol- Oopiee of thin patent may be obtained for lowed body, said body having an enlarged end to form an expanded combustion chamher, a head for said cylinder, valve seats formed integrally in said head to overlap the periphery of the reduced portion of the cylinder body, a water jacket surrounding said body, and a crown plate supported by said integral valve seats and overhangin said combustion chamber to form the topo said jacket.

In testimony whereof I aflix my si CLARENCE A. KIRI ature. AM.

five cents each, by addressing the "Commissioner 0! Patents,

Washington, D. 0. 

